Padlock



F. P. CHERNOVETZV. PADLOCK.

APPLICATION FILED AUG. I9, I92I.

1,41 1,682. Patented Apr. 4, 1922.

Snom/woz UNITED STATES PATENT OFFICE.

PADLOCK.

Specification of Letters Patent.

Patented Apr. 4., 19,22.

Application frled August 19, 1921-. Serial No. 493,710.`

1o all whom t may concern:

Be it known that I, FRANK I. CHERNO- verz, a citizen of Russia, residingat Bridgeport, county of Fairfield, and State of Connecticut, haveinvented certain new and useful Improvements in Padlocks, of which thefollowing is a specification.

This invention relates to improvements in padlocks, and it is theprincipal object of the invention to provide a padlock with keyoperatedmeans for permitting the locking and unlocking of the shackle after acertain operation of said means by a key.

Another object of the invention is the provision of a padlock includingmeans for locking the key-operated means and for automatically unlockingsaid means during operation of the key.

These and other objects of the invention will be more fully described inthe following description reference being taken to the accompanyingdrawing forming a material part of this disclosure.

In the drawing:

Figure 1 is an end view of a padlock constructed according to thepresent invention.

Figure 2 is a front view of the padlock, the View being taken along line2-2 of Figure 1, the cover plate of the lock being partly A broken awayto illustrate the interior arrangement.

Figure 3 is a longitudinal section through the padlock on line 3 3 ofFigure 2.

Figure 4t is a top plan view of a key, and

Figure 5 is a section through the key, the section being taken on line5-5 of Figure 4.

Referring now more particularly to the drawing, the lock 10 has thecustomary shackle 11 pivoted at one of its ends as at 12 and front cover13 attached by means of rivets or the like 13.

On a pin 14 secured between the front and rear walls of the casing ispivotally secured a disc 15 provided with teeth at the larger part ofits outer periphery and formed with a curved slot 16 near its uppermargin by a rim part or flange 17 having an opening 18g A pin 19 securedto the rear wall of the casing and projecting into the slot 16 limitsthe rotation of the disc l5 in either direction.

A star wheel 20 is laterally disposed to the disc 15 on a pin 21, andaleaf spring 22, secured at its lower end by a screw 23 to the rear wallof the casing presses the prongs of the star wheel into engagement withthe teeth of the disc l5.

A wedge 24.- secured by rivets 25 to the front face of the wheel iswider on top and tapering towards its lowerend 26 and engages the frontof the star wheel 20 to displace the same on its pin 21 against theaction of spring 23 Vwound aroundthe rear part of the pin 21, when thedisc 15 is rotated.

This rotation is eHected by means of a star wheel 27 pivotally securedon a pin 28 in the casing and engaging with its teeth the teeth on theperiphery of disc l5.

A key 29 is provided with a bit 31 adapted to enter the key hole 30 andto engage between the teeth of star wheel 27 to operate the same foroperating the disc 15.

A stop 32 is provided in the casing to limit the movement of the bit inone direction.

The lock is operated in the following manner:

Assumed that the shackle 11 is in its locked position shown in Figure 2in which the rim part 17 of the disc 15 is passed through the same, andthe key 29 is inserted with its bit 31 through the key hole 30 andturned by its handle 33 until it engages between the teeth of the starwheel 27 which will be rotated and by its engagement with the teeth ofdisc 15 will rotate the same, so that its rim part or flange 17 Will begradually drawn out of engagement with the shackle which is ree leasedwhen the end of flange 17 arrives at the opening 18 so that the lock maybe opened. During the rotation of thedisc 15 the wedge 24 will graduallypress the star wheel 20 out of engagement with the disc 15 undercompression of the spring 23.

When it is desired to lock the lock again, a rotation of the star wheel27 in opposite direction will also turn the disc 15 so as to graduallyengage with its rim iange the shackle and this rotation of the disc 15will draw the wedge 24 gradually out of engagement with star wheel 20,which will be gradually pressed forward by spring 23 and engage with itsprongs between the teeth of disc 15.

It will be clear that changes may be made in the general arrangement andin the construction of the minor details of my invention withoutdeviating from the spirit and scope of the same.

Having thus described my invention, what I claim is:

1. In a padlock of the class described, a slotted disc, having an openshackle engaging rim fiange and teeth upon its outer periphery, a starwheel engaging .the teeth 'of said disc and adapted to be operated bythe bit of a key for operating said disc to dinf, gage its fian e fromthe shackle, a second starwheel adapted to en age the teeth of said disefor locking it in le closed position of the lock while said Hnge andshacklelare engaged, and means for allowing a depression'of seid secondstar Wheel duringthe operation of said first star wheel by a key.

2. In aY adlock of the character described, a toothed Aisc'having acurved facial slot,` an open shackle engaging rim flange forming saidslota pin in said slot limiting the movement of said disc in eitherdirection, a key operated stai' Wheel engaging said disc and adapted toturn the same into and out of the shackle engaging position by its ange,Wedge secured to the faoe of s'aid disc, a sec-l 20 ond star Wheel, apin for said last named*` Wheel, a spring on said pin adapted to pressi(the `teeth of sudleecond star wheel into enagement with the teeth oi'said disc but alowing a depression of said second star 25 wheel duringthe operation of said first named ster Wheel by a` key.

In testimony whereof I have kaiiixed my signature.

' FRANK P. CHERNOVETZ.

